It was a betrayal and that to even Kill his only sister. It proves how un-loving his is. It proves that he cannot have a family. He will only be killing them instead. Plus it is a betrayal to Marcus as well.

4

It lessened his fan base (despite the fact he's one of my fave characters).

5

They choose to leave, it was their choice... not his

6

She would have been good in a situation like Edward's, she could have made him feel happy and convinced him to stay (like Aro wanted)

7

It's Psycho-ish to murder your family

8

It opens a weakness within the Volturi, for those who plan to beat them & gain control of the vampire world

9

It was childish & selfish, when you think about it... killing someone so another won't leave you

10

Aro would be in big trouble If Marcus found out

Feel free to keep the list going!

11

Didyme made Marcus Happy and therefore Marcus would be more willing to side with him than be neutral

12

Marcus is soo boring now that she's dead.

13

because it made Marcus unhappy. I feel sooo sorry for Marcus.

14

It made the Volturi officaly corrupte rulers

15

Didyme had the gift to make people happy, also known as the aura of happiness.she didn't deserve to be killed by her own brother, she would of been a great vampire

16

at least, he could ask Chealse to use her gift and make Marcus and Didyme stay. not kill!

17

nobody who is normal won't kill his own sister and his best friend's beloved wife

18

she was so sweet and cheerful

19

Marcus would not be so boring!

20

His friend:Marcus was in love with her.

21

She made Marcus happy.

22

She was Marcus's true love.

23

If they wanted to leave then they could they were choice not his.

24

Makes him seem weirder and crazier

25

Her power was to make people happy,so in New Moon she could have made Edward not want to kill himself,and join the Volturi like Aro wanted.

This list uses a defunct format. Due to technical restrictions, lists using this format can not be converted to the current format.However, lists using this format are still kept and may continue to be edited.